D-Wave Systems (dwavesys.com) is a portal to the state of the art in the design of quantum computers, operating systems, algorithms, hardware, superconductors, and quantum physics. http://www.dwavesys.com
The home site of the first start up company devoted entirely to quantum computing. No patents or products to date, but of interest by virtue of being first off the block. http://www.magiqtech.com
A Windows based simulator of quantum computer hardware. Provides an environment to execute quantum algorithms under realistic experimental conditions. http://rugth30.phys.rug.nl/compphys0/qce.htm